commander nicholas rodriguez, said he considered the release a sign of peace. >> we are freeing the canadianeologist, who was kept captainist by organizations since january. we are turning him over in a humanitarian act. >> inspired by the cuban revolution, the eln was born in the 1960's to fight against poverty and injustice. it has battled the government for decades attacking oil pipeline and foreign corporations. previous attempts at peace have failed. a former e.l.m. leader says this time, it will be different. >> i have no doubts because the interests coincide with the country's interests. which is bringing columbia's internal conflict to an end. the struggle plays role in columbia, but it is trying to overcome that role, and that's something that rebel groups and society will have to do together. >> eventual peace negotiations will be held outside of columbia, and in parallel with peace talks in havana. most people bringing the eln is vital if there's to be a peace deal and one that lasts. >> scientists in new zealand have confirmed that bacteria found in suspect weigh protein products